Sciatica Explained: Symptoms, Causes, and Best Treatments Sciatica is one of the most common causes of leg pain and lower back discomfort seen in physiotherapy clinics. It can range from mild irritation to severe pain that affects walking, sleeping, sitting, and everyday activities. 

For some people, sciatica resolves relatively quickly. For others, symptoms can persist for weeks or months and significantly impact quality of life. 

Understanding what sciatica is and more importantly, what causes it is essential for effective treatment and recovery. 

In this article, we’ll explain: 

• What sciatica is  
• Common symptoms  
• The main causes  
• How physiotherapy can help  
• The best treatment options  
• When to seek professional advice  

What Is Sciatica? 

Sciatica refers to pain caused by irritation or compression of the sciatic nerve. 

The sciatic nerve is the largest nerve in the body. It begins in the lower back and travels through the buttock, down the back of the leg, and into the foot. 

When this nerve becomes irritated, symptoms can occur anywhere along its pathway. 

Sciatica is not actually a diagnosis itself it is a symptom of an underlying issue affecting the nerve. 

What Does Sciatica Feel Like? 

Sciatica symptoms can vary from person to person. 

Some people experience mild discomfort, while others develop severe pain or neurological symptoms. 

Common Symptoms of Sciatica 

• Pain in the lower back  
• Pain travelling into the buttock or leg  
• Sharp or burning pain  
• Tingling or pins and needles  
• Numbness in the leg or foot  
• Weakness in the leg  
• Pain when sitting for long periods  
• Symptoms worse when coughing or sneezing  

Sciatica usually affects one side of the body, although symptoms can occasionally occur on both sides. 

Where Is Sciatica Pain Felt? 

The location of symptoms depends on which part of the sciatic nerve is irritated. 

Pain may travel through: 

• The buttock  
• Back of the thigh  
• Calf  
• Outer leg  
• Foot or toes  

Some people feel more leg pain than back pain, while others experience both equally. 

Common Causes of Sciatica 

There are several possible causes of sciatic nerve irritation. 

Understanding the underlying cause helps guide treatment and recovery. 

1. Herniated or “Slipped” Disc 

One of the most common causes of sciatica is a lumbar disc herniation. 

Discs sit between the vertebrae in the spine and act as shock absorbers. If part of a disc bulges or herniates, it can irritate nearby nerves. 

Despite the term “slipped disc,” the disc does not actually slip out of place. 

Symptoms of Disc-Related Sciatica 

• Sharp leg pain  
• Pain worse when bending  
• Tingling or numbness  
• Pain when sitting  
• Symptoms aggravated by coughing or sneezing  

Disc-related sciatica often develops after: 

• Heavy lifting  
• Repetitive bending  
• Twisting movements  
• Sudden strain  

2. Spinal Stenosis 

Spinal stenosis occurs when the spaces around the nerves narrow, placing pressure on the sciatic nerve. 

This is more common in older adults and is often related to age-related changes in the spine. 

Symptoms of Spinal Stenosis 

• Leg pain when walking  
• Symptoms relieved by sitting  
• Heaviness or weakness in the legs  
• Reduced walking tolerance  
• Back stiffness  

Many people with spinal stenosis notice they feel better leaning forward slightly, such as when pushing a shopping trolley. 

3. Piriformis Syndrome 

The piriformis muscle is located deep in the buttock near the sciatic nerve. 

If this muscle becomes tight or irritated, it may compress the nerve and cause sciatic-like symptoms. 

Symptoms 

• Buttock pain  
• Pain sitting for long periods  
• Pain radiating down the leg  
• Tenderness in the glute area  

Piriformis syndrome is less common than disc-related sciatica but can still be a source of nerve irritation. 

4. Degenerative Changes in the Spine 

As we age, natural wear and tear can affect the joints, discs, and structures surrounding the nerves. 

Degenerative changes can contribute to: 

• Reduced spinal mobility  
• Joint irritation  
• Narrowing around the nerves  
• Persistent lower back pain  

Importantly, many degenerative findings on scans are completely normal and do not always cause symptoms. 

5. Pregnancy 

Sciatica can also develop during pregnancy due to: 

• Increased pressure on the lower back  
• Hormonal changes  
• Altered posture  
• Changes in pelvic alignment  

Many pregnant women experience temporary sciatic symptoms that improve after delivery. 

Is Sciatica Serious? 

Most cases of sciatica are not dangerous and improve with conservative treatment. 

However, severe nerve compression can occasionally occur and requires urgent medical attention. 

Seek Immediate Medical Help If You Experience: 

• Loss of bladder or bowel control  
• Numbness around the groin or saddle area  
• Severe weakness in the legs  
• Rapid worsening of symptoms  

These symptoms may indicate a rare but serious condition called cauda equina syndrome. 

How Is Sciatica Diagnosed? 

A physiotherapist or healthcare professional can usually diagnose sciatica through: 

• Symptom history  
• Movement assessment  
• Neurological testing  
• Strength and reflex testing  

In many cases, scans such as MRI are not immediately necessary unless: 

• Symptoms are severe  
• There is significant weakness  
• Symptoms persist long term  
• Serious pathology is suspected  

Best Treatments for Sciatica 

Treatment depends on the cause, severity, and duration of symptoms. 

In most cases, conservative management is highly effective. 

1. Physiotherapy 

Physiotherapy is one of the most effective treatments for sciatica. 

A physiotherapist can help: 

• Reduce nerve irritation  
• Improve mobility  
• Restore strength  
• Improve movement patterns  
• Reduce pain sensitivity  
• Build confidence in movement  

Treatment is tailored to the individual rather than using a one-size-fits-all approach. 

Physiotherapy May Include: 

• Mobility exercises  
• Strengthening work  
• Neural mobility exercises  
• Manual therapy  
• Postural advice  
• Education and reassurance  

Exercise-based rehabilitation is often key to long-term recovery. 

2. Staying Active 

Many people assume bed rest is best for sciatica, but prolonged inactivity can actually worsen symptoms. 

Gentle movement helps: 

• Maintain circulation  
• Prevent stiffness  
• Improve mobility  
• Reduce fear of movement  

Walking is often a good starting point if tolerated comfortably. 

3. Exercise Rehabilitation 

Specific exercises can help improve: 

• Core strength  
• Spinal mobility  
• Hip mobility  
• Nerve movement tolerance  
• Functional strength  

Exercise programmes should be individualised based on symptoms and presentation. 

4. Pain Management 

Short-term pain relief strategies may include: 

• Heat therapy  
• Activity modification  
• Medication prescribed by a GP  
• Gentle stretching  
• Positioning advice  

Pain management should support recovery rather than replace movement and rehabilitation. 

5. Lifestyle Modifications 

Certain lifestyle factors may contribute to ongoing symptoms. 

Addressing these can improve recovery: 

• Prolonged sitting  
• Poor sleep  
• Stress  
• Physical inactivity  
• Sudden spikes in activity  

Persistent pain is influenced by many factors beyond tissue damage alone. 

Does Sciatica Go Away on Its Own? 

Many episodes of sciatica improve within several weeks. 

However, some people develop: 

• Recurring flare-ups  
• Persistent pain  
• Weakness  
• Reduced confidence in movement  

Early treatment may help reduce the risk of symptoms becoming chronic. 

What Makes Sciatica Worse? 

Common aggravating factors include: 

• Long periods of sitting  
• Heavy lifting  
• Poor movement habits  
• Sudden twisting  
• Inactivity  
• High stress levels  

Understanding aggravating movements can help guide rehabilitation. 

Can You Exercise With Sciatica? 

In many cases, yes. 

Exercise is often an important part of recovery, although some activities may need temporary modification. 

A physiotherapist can guide you on: 

• Safe exercises  
• Gradual progression  
• Load management  
• Returning to sport or gym training  

Avoiding all movement long term can often slow recovery. 

How Long Does Sciatica Last? 

Recovery times vary depending on: 

• The underlying cause  
• Severity of nerve irritation  
• Activity levels  
• General health  
• Treatment approach  

Some cases improve within a few weeks, while others may take several months. 

Consistent rehabilitation and gradual activity progression are often important for recovery. 

Can Physiotherapy Prevent Sciatica Returning? 

Although no treatment can guarantee prevention, physiotherapy can help reduce recurrence risk by: 

• Improving strength  
• Increasing mobility  
• Addressing movement patterns  
• Improving lifting technique  
• Increasing activity tolerance  
• Supporting long-term spinal health  

Education and self-management are key parts of preventing future flare-ups. 

What Happens During a Physiotherapy Assessment for Sciatica? 

A physiotherapist will assess: 

• Pain location and behaviour  
• Strength and reflexes  
• Movement patterns  
• Nerve involvement  
• Mobility limitations  
• Functional activities  

Treatment is then tailored specifically to your symptoms and goals. 

Final Thoughts 

Sciatica can be painful, frustrating, and limiting, but most people improve significantly with the right treatment and rehabilitation approach. 

Understanding the cause of your symptoms is essential for recovery. Whether your sciatica is related to a disc injury, spinal stenosis, muscle irritation, or postural strain, physiotherapy can help reduce pain, improve movement, and restore confidence in activity. 

If your symptoms are persistent, worsening, or affecting your daily life, seeking professional advice early may help you recover faster and prevent long-term problems. 

Frequently Asked Questions 

Is walking good for sciatica? 

In many cases, yes. Gentle walking can help maintain mobility and reduce stiffness. 

Can sciatica heal without surgery? 

Yes. Most cases improve with conservative treatment such as physiotherapy and exercise rehabilitation. 

How do I know if I have sciatica? 

Typical symptoms include lower back pain with pain, tingling, or numbness travelling into the leg. 

Should I rest with sciatica? 

Short-term rest may help during severe flare-ups, but prolonged inactivity is usually not recommended. 

Can physiotherapy help sciatica? 

Yes. Physiotherapy is one of the most common and evidence-based treatments for managing sciatic pain and improving recovery.